#!/bin/bash

GDAL_TILE_PROCESSES=16
GDAL_TILE_ZOOMS=8-14
GDAL_SAMPLING_WARP=cubic
GDAL_SAMPLING_TILE=antialias

# Create virtual dataset with coordinates
gdal_translate -of VRT -a_srs EPSG:4326 -outsize 300% 300% -gcp 1926.0 1167.0 25.837216666666666 64.75 -gcp 16524.0 1200.0 26.337216666666666 64.75 -gcp 16497.0 14295.0 26.337216666666666 64.5 -gcp 1821.0 14259.0 25.837216666666666 64.5 bruno/S-17.Subbat 1917.jpg S-17.Subbat 1917.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1926.0 1167.0\n16524.0 1200.0\n16497.0 14295.0\n1821.0 14259.0" | \
  gdaltransform -tps -output_xy S-17.Subbat 1917.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  S-17.Subbat 1917.vrt S-17.Subbat 1917.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES S-17.Subbat 1917.cut.vrt S-17.Subbat 1917.xyz